Saraei Maryam, Omidi Roya, Aminian Omid, Izadi Nazanin, Akbarpour Samaneh, Ebrahimi Meimand Sepideh
Center for Research on Occupational Diseases, Tehran University of Medical Sciences, Tehran, Iran.
Occupational Sleep Research Center, Baharloo Hospital, Tehran University of Medical Sciences, Tehran, Iran.
Indian J Otolaryngol Head Neck Surg. 2022 Dec;74(Suppl 3):3887-3892. doi: 10.1007/s12070-021-02697-4. Epub 2021 Jun 29.
Noise and organic solvents are common in many industries and both of them affect hearing. In this study, we estimated the concurrent effect of them on hearing by evaluating the existence of notch in audiograms of workers. The number of 540 persons were enrolled in this study after eliminating workers who had the exclusion criteria. We divided them into 4 groups based on their exposure status; no exposure, exposure to noise, exposure to solvent, exposure to both of them. The presence of notch in left, right, or both ears were assessed through Coles model. The rates of notch presence in both ears in the groups of noise and organic solvents exposure, noise exposure only, solvents exposure only were 11.72, 4.49, 1.86 times higher than the control group and sole solvent exposure didn't affect hearing significantly. The same pattern was seen for notch presence in left or right ear and the solvent-noise exposure group had the highest rate of notch presence. This study aims to show the synergic effect of noise and organic solvents exposure on hearing loss. Hence, we recommend implementing a hearing protection program and a higher frequency of audiological assessments in the industries involved with concurrent exposure to noise and organic solvents.
噪声和有机溶剂在许多行业中都很常见，它们都会影响听力。在本研究中，我们通过评估工人听力图中切迹的存在情况来估计它们对听力的联合影响。在排除具有排除标准的工人后，本研究共纳入了540人。我们根据他们的暴露状况将他们分为4组：无暴露、暴露于噪声、暴露于溶剂、同时暴露于两者。通过科尔斯模型评估左耳、右耳或双耳中切迹的存在情况。噪声和有机溶剂暴露组、仅噪声暴露组、仅溶剂暴露组双耳切迹出现率分别比对照组高11.72、4.49、1.86倍，且仅溶剂暴露对听力无显著影响。左耳或右耳切迹出现情况也呈现相同模式，且溶剂 - 噪声暴露组切迹出现率最高。本研究旨在表明噪声和有机溶剂暴露对听力损失的协同作用。因此，我们建议在同时暴露于噪声和有机溶剂的行业中实施听力保护计划并增加听力评估的频率。
